Add ability to call Anchor programs, including example from the basic…

…-0 tutorial. Added AnchorTest.

.gitignore

@@ -6,5 +6,5 @@ build
 .settings
 .idea
 *.iml
-secretkey.dat
+*.dat
 *.properties

src/main/java/org/p2p/solanaj/programs/anchor/AnchorBasicTutorialProgram.java

@@ -0,0 +1,73 @@
+package org.p2p.solanaj.programs.anchor;
+
+import org.p2p.solanaj.core.Account;
+import org.p2p.solanaj.core.AccountMeta;
+import org.p2p.solanaj.core.PublicKey;
+import org.p2p.solanaj.core.TransactionInstruction;
+import org.p2p.solanaj.programs.Program;
+
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Implements the "initialize" call from Anchor's basic-0 tutorial.
+ */
+public class AnchorBasicTutorialProgram extends Program {
+
+    // Testnet address of basic-0 = EkEwddr34fqnv2SJREPynyC335PE32PAfjY4LVW5bTJS (has a method called initialize)
+    private static final PublicKey PROGRAM_ID = new PublicKey("EkEwddr34fqnv2SJREPynyC335PE32PAfjY4LVW5bTJS");
+    private static final String FUNCTION_NAMESPACE = "global::initialize";
+
+    /**
+     * Calls basic_0::initialize
+     *
+     * @param caller account signing the transaction
+     * @return tx id
+     */
+    public static TransactionInstruction initialize(Account caller) {
+        final List<AccountMeta> keys = new ArrayList<>();
+        keys.add(new AccountMeta(caller.getPublicKey(),true, false));
+
+        byte[] transactionData = encodeInitializeData();
+
+        return createTransactionInstruction(
+                PROGRAM_ID,
+                keys,
+                transactionData
+        );
+    }
+
+    /**
+     * Encodes the "global::initialize" sighash
+     * @return byte array containing sighash for "global::initialize"
+     */
+    private static byte[] encodeInitializeData() {
+        MessageDigest digest = null;
+        byte[] encodedhash = null;
+        int sigHashStart = 0;
+        int sigHashEnd = 8;
+
+        try {
+            digest = MessageDigest.getInstance("SHA-256");
+            encodedhash = Arrays.copyOfRange(
+                    digest.digest(
+                            FUNCTION_NAMESPACE.getBytes(
+                                    StandardCharsets.UTF_8
+                            )
+                    ),
+                    sigHashStart,
+                    sigHashEnd
+            );
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
+
+        return encodedhash;
+    }
+
+
+}

src/main/java/org/p2p/solanaj/serum/SerumManager.java

@@ -71,7 +71,7 @@ public String placeOrder(Account account, Account openOrders, Market market, Ord
      * @return transaction id of ConsumeEvents call
      */
     public String consumeEvents(Market market, Account payerAccount) {
-        // Get all open orders accounts TODO - fix this
+        // Get all open orders accounts
         final Transaction transaction = new Transaction();
 
         transaction.addInstruction(

src/test/java/org/p2p/solanaj/core/AccountBasedTest.java

@@ -23,7 +23,7 @@ public static void setup() {
         byte[] data = new byte[0];
 
         try {
-            data = Files.readAllBytes(Paths.get("secretkey.dat"));
+            data = Files.readAllBytes(Paths.get("testnet.dat"));
         } catch (IOException e) {
             e.printStackTrace();
         }

src/test/java/org/p2p/solanaj/core/AnchorTest.java

@@ -0,0 +1,48 @@
+package org.p2p.solanaj.core;
+
+import org.junit.Test;
+import org.p2p.solanaj.programs.MemoProgram;
+import org.p2p.solanaj.programs.anchor.AnchorBasicTutorialProgram;
+import org.p2p.solanaj.rpc.Cluster;
+import org.p2p.solanaj.rpc.RpcClient;
+import org.p2p.solanaj.rpc.RpcException;
+
+import java.util.List;
+
+import static org.junit.Assert.assertNotNull;
+
+public class AnchorTest extends AccountBasedTest {
+
+    private final RpcClient client = new RpcClient(Cluster.TESTNET);
+
+    /**
+     * Calls a testnet Anchor program: (tutorials/basic-0)'s 'initialize" call.
+     * Also attaches a memo.
+     */
+    @Test
+    public void basicInitializeTest() {
+        final Account feePayer = testAccount;
+
+        final Transaction transaction = new Transaction();
+        transaction.addInstruction(
+                AnchorBasicTutorialProgram.initialize(feePayer)
+        );
+
+        transaction.addInstruction(
+                MemoProgram.writeUtf8(feePayer, "I just called an Anchor program from SolanaJ.")
+        );
+
+        final List<Account> signers = List.of(feePayer);
+        String result = null;
+        try {
+            result = client.getApi().sendTransaction(transaction, signers, null);
+        } catch (RpcException e) {
+            e.printStackTrace();
+        }
+
+        assertNotNull(result);
+    }
+
+
+
+}